Release mega-20180915
Changes in mega-20180915 (since mega-20180914):
ESPEasy release bot (1):
automatically updated release notes for mega-20180915
Plebs (1):
Added 2 new operators in Calculate
TD-er (4):
[Scheduler] Disable command scheduler
[Controller settings] Validate settings on load/save
[#1713] Make hostname-unitnumber optional & validate settings
[#1698] Incorrect sunrise value southern hemisphere
svmac (4):
Fix elseif & Add if-elseif-else nesting levels
reenabled code about !
some code optimization
fix mistake